Apparatus for measuring and indicating blood-pressure.



0.1. FILLING. APPARATUS FOR MEASURING AND INDICATING BLOOD PRESSURE. APPLICATION man FEB. 5. 12912.

Lb, Patented Sept. 14, 1915.

ATTORNEY coLUMBlA PLANDGRAPH t0.. WASHINGTON, D. c.

pio

CHARLES J'. FILLING', OF PHILADLPHI, PENNSYLVANIA.

APPARATUS FOR MEASURING AND INDICATING BLOOD-PRESSURE.

Massai.

specificati@ of Letters Patent. temen-md Sepe, M, 19315 .appucation med February 5, 1912. serial No. 675,590.

To all fwiomz't may concern.'

Be it known that I, CHARLES J. FILLING, citizen of the United States, residing in the city of Philadelphia, Stateof Pennsylvania, have invented certain new and useful -Improvements in Apparatus for Measuring and indicating Blood-Pressure, of which the following is a full, clear, and exact description, reference being had to thev accompanying drawings, forming a part of this specification.

My invention relates to apparatus adapted especially for use in pathological diagnosis, for measuring, and indicating on a pressure-scale, thepressure of the blood in any artery of the human body adapted to be constricted by suitable means such as any usual form of expansible tourniquet; andit'es pecially relates to the `particular type of such apparatus described' inU.' S. patent to Francis Ashley Faught, No. 917,276 dated April 6, 1909', wherein the apparatus, of that type, exemplifies the principle involving a closed pneumaticA system comprising a mercury manometer, a constriction device adapted to be applied to and to make a circular' `pressure upon an arterycontalning portion of the human body, such as the .fore-arm, a source of compressedl air-supply, and connecting tubularv means to supply an increas? ing airpressure between the constriction device and one end of the mercury column on 'the manometer, with Va pressure-scale adapted to note such increasing pressure and the degree to which it shall fall when constricl tion of the artery is released and the arterial pulse-beat noted, by means of a suitable valve adapted to release the air-pressure in said tubular connections.

My improvements are predicated on the particular example of such apparatus described in said Faught patent, and consist of a novel character of manometer tube, a novel form ofrigid tubular connection between it andthe flexibletubes leading respectively to the source-v ofcompressed air-supply and the constriction device, and new relative arrangement of the several elements, except the rectangular containing casing of that apparatus, with its pivotedlid on which the manometer tube with itsrigid tubular conf nections is mounted. rlhis form of contain.- ing case and its mounting lid I have adopted without change and hence they form no part of my VVpresent invention .herein @@Slbed and claimed, save in the specific 'features of improvement thereof as hereinafter stated.

in the accompanying drawings illustrat ing my invention: Figure l is afront orend elevation, partly in section, with the pivoted lid of the casing in raised position, hence showing the manometer in vertical and operative position, and showing also the flexible tubular connections leading respectively to the constriction device (not shown) and to the source of compressed air supply which is shown in full in elevation. Fig. 2 is a like view, in side elevation, except the aforesaid flexible tubular connections and air-pump, which are removed. Fig. 3 is a sectional detail showing the link and its cooperating pin for holding the pivoted lid in theraised positions f Referring'now to said drawings, the rectangular containing casing A, its pivoted lid AQ operating as a closure for'the casing and as a mounting for the manometer tube, with the hinge pins, a, link connection 71 and brackets. o, b to 'support ,the manoineter tube and its adjunctive parts, are precisely the same as' shown and described in said Faught patent, lto which reference is made for further description if need be, though they are clearly shown in the drawin gs hereto annexed. To such a containing casing I add a spring guide-clip Z which clamps the edges of a pressure-scale board C and permits of a sliding-adjustment of said pressure-scale board C, whichlatter is also the same as in said patent referred to; and I mount in the basal interior of the casing a pair of spring clips s, s, between which the air-pump S may be convenientlyheld detachably, when not in use. p

One end vof the link it is pivoted, at ha, to a bracket h2 securedto the lid The link it has a longitudinal slot h1 therein, and extending through the slot hr1 is a pin h4 whichfis iixed tothe side. of thecasing A.. The' upper wall .72.6 of theslot Llis pressed against the pin which extends around the pin tiand'has its upper end bearing against thelower wall of the slot hr1 and its lower endsecured to 'the adjacent side of the cas- 'ing A. VThe 'upper wall 71,6V of theslot h1 has an offfset 7i therein, forming a socket, asclearly shown in Fig. 3, which-.is moved down around the upper portion of thepin h4 by the pressure of the spring r" when the lid A1 is'in the upright position shown in the Y lid A1 to close'the casing A, the'link 7L is lifted manually to free the socket 7N from the pin 7L4,'an'd'the lid A1 is lowered; and,

during the lowering of `the lid A1 the upper andlower walls of the slot 71,1 slide against' the pin 7;,1 and the spring 71,5. It will therefore be understood that when the lid A1 is raised-the walls of the slot 71,11 will slide against the pin 7b4 andspring 7t5'and also that when the lid reachesthe upright or operative position the spring'h.5 will automatically engage Vthe socket 7L7 with the pin 71,4 to retain thelid in such upright position.

Mounted on the inner face of the hinged casing lid A isa mercury manometer B consisting of: a glass tube having a long vertically'disposed portion, open at the top, and supplied thereat with an air-nipple c governed by ay Lstop-cock c. At its basal end the manometer tube is bent upward on a largecurve .and terminates in a verticallydisposed and relatively-large chambered end B, which is operatively closed; though it is constructed with an vopen upper end through Y which passes a'depending tapered glass airtube m3 for a purpose to be presently explained. Y

F or convenience of construction the glass mercury chamber lor bulbfB is molded or blown withanintegral extension end indicated in dotted lines at m2, which carries within it the tapered glass tube m3 which dependingly projects downward within the f bulb B to about vhalf the depth thereof.

The said extension end mZ-of the'bulb and the lower end ofthe rigid tube m, about to be described, are operatively connected by a i rubber tubular covering m. l

- In U-spacedk manometer tubesy and the like, employed in apparatus of this class, a sev.rions inconvenience and loss, amounting to a Feo defect in operation, is. experienced in the mercury discharging, to some considerable extent, into the tubular connections adjacent thereto, on a release of the air-pressure after constrictionfis eected; and this is entirely obviatedfinmydevice by providing the mercury tube with a relatively large'bulbous end and leading. the compressed air to and 'from' ythe Ysame through themediumfof the smalle? air-tube im?? which .extends Y dependinglyinto vthel .mer-cury; bulb B and above `the Zero-line of contained Y mercury.

The manometerf--tube is heldin vplace'at top-and bottom onv its hinged mountingboardvA, by/brackets fb and 7). A small spring-clip mounted Vin a'. guiding bracket d secured tosaid board -A supports a pressure-scale board Cfby ffrietionalV contact therewith, whereby it is held in vertically adjustable register with the manometer tube.

[Rigid tubularv connections, preferably of fully shown and described.

metal, consist of a tube m, mounted on the hinged board A by brackets d', d2, said brackets being each made preferably with an integral tubular hub 033, d4, each terminating in a nipple d5, do, and for economy and conflexible tube g leading to any suitable form of arterial constriction device, such as that shown in Faughts patent before referred to. Mounted detachably on the lower nipple d is another iiexible tube which leads to and is connected with the discharge end d1 of an air-pump, whereby the required volume of compressed air is supplied to the instrument. This air-pump is constructed with a barrel S, with the usual piston'carried by a hollow piston rod s actuated by a pair of lingergrasp handles s, s', the upper end of the piston-rod opening into a hubbed discharge end 077 provided with a sensitive release valve indicated at t. For a fuller description of this element of the device, which contains several novel features, reference is made to Letters Patent to me, No. 1,054,866, dated March 4, 1913, in which it is more Concerning the operation of the device, it

' need only be said, in addition to the description given, that the manometer being charged with mercury until it reaches a level in the bulb B on a line with Zero mark on the pressure scale, the opening c, at top, is closed; the hinged lid A being previously raised out of the casing to operative vertical position, as shown, and held in that position by the spring 7L5 forcing the recessed portion 7b4 of the slot in the link into register with the pin H. The pump barrel, with its attached Hexible tube f, detached from its holding Aclips on the body of the easing, and said tube, as also flexible tube g leading to the Aconstriction device, being vattached to nipples 75 and d in the order shown and described,.air-pressure created by operation of the pump piston extends equally to the manometer as to the constriction device, until at the appropriate time the sensitive release valve t is operated to release the air compression; and the position of the mercury column relatively to the scale markings noted at the first pulse beat felt,- which will indicate the exact pressure in the artery.

Having thus described my invention, I claim as new and desire to secure by Letters Patent l. In an apparatus of the class recited, the combination of a containing casing, a lid pivoted near one of its ends to said casing, a manometer tube fixedly mounted on said pivoted lid, said lid and the tube thereon being adapted to be moved to a perpendicular and operative position, a pin secured to said casing, a link pivoted to said lid and having a part adapted to engage said pin and support said lid in said perpendicular position, and a spring adapted to automatically move said link into engaging position With said pin to support said lid when it is moved to said perpendicular position.

2. In apparatus of the class recited, the combination of a containing casing, a lid pivoted near one of its ends to said casing, a manometer tube Xedly mounted on said pivoted lid, said lid and the tube thereon being adapted to be moved to a perpendicular and operative position, a pin secured to said casing, a link pivoted to said lid and having a longitudinal slot4 therein through which said pin extends, one Wall of said slot having an off-set adapted to engage said pin and support said lid in said perpendicular position, and a spring adapted to automatically movesaid link so as to force said oE-set into engagement with said pin to support said lid When it is moved to said perpendicular position.

In testimony whereof, I have hereunto affixed my signature this thirtieth day of January A. D. 1912. Y

` CHARLES J. FILLING.

Witnesses:

A. M. BIDDLE, R. A DUNLAR Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. G. 

